Explain the effect of expressing only S1 on the cells in culture 1. Describe the effect of expressing combinations of protein S and protein R on the survival of the cells in culture 2 AND culture 3.

biology is the study of life. it is the study of living organism.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

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